*
{
	padding: 0;
	margin:0;
}
#firstdiv
{
	margin:-100px 0 0 -200px;
	padding: 0;
	border:0 solid #999;
	background-color: #ccc;
	width: 400px;
	height: 200px;
    position: absolute;
    top: 50%;
    left: 50%;
}

#seconddiv
{
	border:0 solid #999;
	width: 50px;
	height: 50px;
	margin:0;
	position: absolute;
	left: 0;
	top: 0;
	border-bottom-right-radius: 50px;
	background-color: #fc0;
}
#thireddiv
{
	border: 0 solid #999;
	width: 50px;
	height: 50px;
	margin:0;
	padding:0;
	position: absolute;
	left: 350px;
	top: 150px;
	border-top-left-radius: 50px;
	background-color: #fc0;
}